During Roosevelt's years in office, Black Americans began voting for Democrats rather than Republic in nation electons, but Black support for Democrats at the state and local levels ( developed only after when civil rights legislation was supported by Harry Turman ).
A. developed only after when civil rights legislation was supported by Harry Turman
B. developed only after when Harry Turman supported civil rights legislation
C. developed only after Harry Turman's support of civil rights legislation by Harry Turman
D. develops only at the time after the supporting of civil rights legislation by Harry Turman
E. develops only after there being Harry Turman's support of civil rights legislation
答案是C,错选了B。感觉C说的好绕,B的错误是only after 和when连用吗?麻烦老师讲解。
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调查1200人对A B C 的喜好,喜欢A的40%,喜欢B的58%,喜欢C的40%,同时喜欢AB的30%,求喜欢C但不喜欢A B的人
题目:A Printer numbered consecutively the pages of a book, beginning with 1 on the first page. In numbering the pages, he printed a total of 189 digits. How many pages are there in the book?
问题:看了中文翻译并听了管老师的讲解,我都没弄明白这个题目的解题思路。的别是对“a total of 189 digits”的处理。
题目:If n is a prime number greater than 3, what is the remainder when n的平方is divided by 12?
问题:当管老师解题时,他出了3个方程式,分别是:
1) n=3A+1, n的平方=9A(square)+6A+1
2) n=3A+2, n的平方=9A(square)+12A+4
3) n=2A+1, n的平方=4A(square)+4A+1
我不明白的点是:这3个方程式是怎么推到或者是一看到题目就这么设出来的?